Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Alan T. Chang, MD

Individual provider Internal Medicine Physician · NPI 1699784934

Alan T. Chang, MD is an Internal Medicine in Escondido, California. Graduated from University of Southern California Keck School of Medicine in 1995, 31 years ago. Practices with Graybill Medical Group Inc, a 104-clinician group, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
31
Trained at
University of Southern California Keck School of Medicine
Licensed in
CA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

225 E 2nd Ave
Escondido, CA 92025-4249
Phone: (760) 291-6700
Fax: (760) 745-1588
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence G79904 (CA)

Record details

NPI number1699784934
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 5, 2006
Last updated in NPPESDecember 12, 2024
Certification dateDecember 12, 2024
Mailing address225 East Second Avenue, Escondido, CA 92025-4249

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF SOUTHERN CALIFORNIA KECK SCHOOL OF MEDICINE
Graduated 1995 (31 years in practice)
Group practice Graybill Medical Group Inc — 104 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations3 on file with Medicare

Other providers in Escondido